Operating means for pinking devices



Feb. 13, 1940. v. J. SIGODA OPERATING MEANS FOR PINKING DEVICES Filed July 26, 1938 2 Sheets-Sheet 1 INVENTOR. VICTOR d. Swoon BY 777 *6 I ATTORNEY.

Feb. 1.3, 1940. v, J; IG D 2,189,965

OPERATING MEANS FOR PINKING DEVICES Filed July 26, 1938 2 Sheets-Sheet 2 5 J jay/ I 322 I INVENTOR: VICTOR (1 5/000:

BY M

'- ATTORNEY.

Patented Feb. 13, 1940 oFFi-ce OPERATING MEANS PINKING DEVICES Victor J. Sigoda, Brooklyn, N. "Y., assignor to Man-Sew Pinking Attachment Corp, New York, N. Y. a corporationof New York v 12 Claims.

This invention relates to operating means for pinking devices and more particularly to means i for operating the rotary pinking or trimming member of an attachment designed for applica- 5 tion to various standard makes of sewing machines. This pinking attachment forms the subject matter of my pending application for patent Serial No.,45,787 filed October 19, 1935.

In the above application, I have shown sev- 0 eral means whereby the desired rotary motion may be transmitted to the cutting or pinking member from the conventional four-motion feed mechanism such, for instance, as is found on the well-known Singer sewing machine. It has been found, however, that such a power transmission or operating means for the pinking attachment is not applicable to the Wilcox & Gibbs sewing machine, which employs a radically differenttype of four-motion feed. mechanism.

I have succeeded in solving this diificulty whereby the pinking attachment of my pending application may be easily and quickly-applied to the latter make of sewing machine with very little structural alteration, and at minimum expense.

My present improvements are essentially characterized by the provision of a horizontally reciprocating operating member interposed between the base plate of the pinking attachment and the bed plate of the sewing machine and operatively connected with a movable part which transmits horizontal reciprocating motion to the'ieed' dog, and with the oscillatory clutch ring of the [pinking attachment which transmits intermittent .36 motion to the pinking or cutting member.

It. is a prominent object of the invention to provide the bed plate of the sewing machine with means for mounting andaccurately guiding the operating member for the pinking attachment M and connecting thesame with the movable part vof the feed mechanism. In the Wilcox & Gibbs sewing machine the bed plate is of such thickness and cross-sectional form that'I am enabled to accomplish this purpose by merely cutting a groove or channel in the upper portion of the plate atthe desired location, which automatically produces an opening communicating with the base of the channel, for the accommodation of a connecting means between said, operating member and the movable part of the feed mechanism. The upper open side of said channel is covered and the operating member concealed by the base plate of the pinking attachment.

A further object of the inventionis the provision of simple and effective means for supplying Application July26, 1938, Serial No. 221,289

a suitable lubricant from a common source of supply to the movable parts of the pinking attachment and to thebearing for-the sewing hook operating shaft of the sewing machine.

With the above and other objects in view, the

invention consists in the improved operating means for pinking devices and in the form, construction and relative arrangement of its .several parts which will hereinafter be more fully described, illustrated in the accompanying drawings and subsequently incorporated in the subjoined claims,

In the drawings wherein I have shown one simple and practical embodiment of the invention, and in which thesimilar reference characters designate corresponding parts throughout the several views,

Fig. 1 is a top plan view showing the pinking attachment as applied to thebed plate of the sewing machine.

Fig. 2 is a side elevation.

Fig. 3 is a vertical sectional view taken substantially on the line 3-3 of Fig; 1.

' Fig. Lisa plan view, the base or cloth plate of the attachment being partly broken away and the pinking member and its actuating clutch,

removed, and Fig. 5 is a detailed sectional view taken on the line 5-5 of Fig. 4.

In the accompanying drawings, I have illustrated only such parts of the Wilcox & Gibbs sewing machine and its feed mechanism as are thought necessary to aclear understandingof the application of the pinking attachment thereto. chine table or bed plate at 5 above which the usual needle operating mechanism, (not shown) is mounted. The four-motion feed dog 6 is air- To this end, I have shown a sewing maranged beneath the 'bed plate for horizontal reciprocating and vertical oscillating movements. Horizontal reciprocation is transmitted to this feed dog from a rock shaft 1 mounted in suitable bearings depending from the bed plate 5, and to which an upwardly projecting arm 8 issuitably fixed at its lower end. One end of the feed,

dog 6 is connected with the upper end of the arm 8 by a leaf spring indicated at 9.

Vertical oscillating motion is impartedto the feed dog from a second rock shaft Hi to which an arm H is fixed. A coil spring I 2 connects this arm with the feed dog 6 to hold the latter in normal position relative to said arm. Vertical lift is transmitted from the arm II to "the feed dog by a connecting leaf spring l3 suitably attached at its-opposite ends to the end. of said dog and the arm II in spaced relation from the coil spring l2.

Immediately above the arm 8, the bed plate 5 is of reduced thickness, being provided on the under side thereof with a cavity 14 of appreciable depth.

The pinking attachment includes the base plate l5 adapted to be suitably mounted upon and securedto the table or bed plate 5 and the throat plate l6 secured upon saidbase plate. This throat plate is provided with the usual slots or openings indicated at l! to receive the upwardly projecting toothed parts of the dog 6 which engage and progressively feed the material beneath the presser foot of the sewing machine in the usual manner.

The plate [6 is further provided in its upper surface with adjacent outer and inner concentric channels or race-ways l8 and [9 to receive the rotary pinking or cutting ring and the oscillatory clutch ring or member 2! respectively. For the purpose of the present explanation, further detailed description of the pinking ring and the actuating clutch therefor is not required. It will-suffice to state, as described in the pending application above identified, that the clutch member 2! is provided with a vertically extending opening 22 therein, registering with a slot or opening 23 in the plate I6, for a purpose to be presently described.

The clutch mechanism is completely covered and concealed by the top plate 24 secured to the plate 56 by the screws 25 and upon which the presser roller 26 is suitably mounted to press the fabric material downwardly upon the upwardly facing cutting teeth of the pinking ring 20.

In a suitable bearing 2?, depending from the bed plate 5 of the machine, the operating shaft 28 for the rotary sewing hook (not shown) is mounted. For the purpose of conveniently lubricating this shaft bearing and the moving parts of the pinking attachment, I provide an oil cup 29 on the cover plate 24 in communication with the recess or cavity 36 in the surface of the plate 6 at the inner side of the channel or raceway IQ for the clutch ring. A shallow groove 3| radially connects this recess 30 with a larger central recess 32 so that the latter receives a part of the'overfiow of the oil from the recess 30, another partthereof flowing into the channel or race-way H). A duct 33 extends downwardly through the plate Hi from the recess 32, and the dripping oil is received on the bearing 27 and flows downwardly through the vertical passage 34 to the shaft 28.

Between the base plate [5 of the attachment and the bed plate or table 5 of the machine, a

horizontal reciprocating operating member 35 is interposed and is actuated from the arm 8 of the feed dog operating mechanism. Preferably, for the purpose of effecting an operative connection of the member 35 between this arm and the clutch ring M with a minimum of structural alteration of the attachment or the machine ,bed or tablet, I mill or cut a channel 36 in the surface of said bedpiate in the proper location with respect to the clutch ring 2| and extending inwardly from one side edge of the bed plate 5 to the opening therein over which the base plate It of the attachment is positioned and secured. In cutting this channel in the bed plate, owing to the reduction in thickness of said plate resulting from the cavity M, an opening 31 i formed, elongated longitudinally of the channel and communicating with thebase thereof.

A pin or stud 38 fixed in the end of the arm 8 projects upwardly through this opening and is fitted into a vertical opening 39 in the operating member 35. Thus, it will be seen that only the single operation of milling or cutting the channel 36 in the surface of the bed plate is necessary in order to enable an operative connection between the member 35 and the arm 8 to be made.

The member 35 adjacent to its other end is provided with a fixed upwardly projecting stud 40 movable in the slot 23 of the plate [6 and having loose fitting engagement in the opening 22 of the clutch ring 2|.

It will be appreciated from the above description that I have provided a very simple and practical solution of the problem involved in the adaptation and use of the novel pinking attachment disclosed in my co-pendin'g application, in connection with the type of fabric feeding mechanism used on the Wilcox 8: Gibbs sewing machine. In the operation of this mechanism, it will be clear that, in the oscillating motion of the arm 8 to horizontally reciprocate the feed dog 6, a corresponding horizontal reciprocating motion will be imparted to the member 35 supported in the channel 36 in the bed plate of the machine. The stud 46 carried by the member 35 in turn transmits rotary oscillating motion to the clutch ring 2!, through the medium of which an intermittent rotary movement in one direction is transmitted to the cutting or pinking ring 2%. From reference to Fig. 1 of the drawing, it willbe seen that the base plate l5 of the attachment extends over the upper open side of the channel 36 in the machine table or bed plate and completely covers and conceals the reciprocating operating member 35.

From the foregoing description, in connection with the accompanying drawings, the construction, manner of operation and several advantages of my present improvements should be clearly understood. Thorough tests have demonstrated the efficiency of the device herein disclosed. Although the invention was conceived and perfected to satisfy the demand for the application of the pinking attachment to a machine having a certain specific type of four.- motion feed mechanism, it will nevertheless be understood that the invention is not necessarily limited in its utility to application and use in connection with the particular feed mechanism above described and illustrated in the accompanying drawings. Also the invention may be susceptible to more or less modification or structural variation in the form and relative arrangement of its several parts. Accordingly, it is to be understood that I reserve the privilege of resorting to all such legitimate mechanical changes as may be fairly comprehended to be Within the spirit and scope of the appended claims.

I claim: I

1. In combination with a sewing machine table and a power operated part, and a fabric trimming attachment having a base secured upon said table and a rotary trimming member; means .for operating said trimming member including a member, independent of said attachment, di-

rectly supported by the table for reciprocating movementin a plane substantially parallel therewith, and means establishing an operative connection between said member and said power operated. part.

2. In combination with a sewing machine table and a power operated part, and a fabric trimming attachment having a base secured upon said table and. a rotary trimming member; means for operating said trimming member including a reciprocable member, independent of said at tachment, and means for operatively supporting member between: the lower surface of the table and the upper surface ofthe attachment base, and means establishing an operative connection between said member'and said power operated part.

3. In combination with a sewing machine table and a power operated part beneath said table,

and a fabrictrimming attachment having a base r mounted upon said table and a rotary trimming Ill member;

for actuation by the latter. 5. In combination with a sewing machine table member; operating means for said trimming member, the upper surface of said table beneath the attachment base being recessed, and said op.-

erating means including a member movable in said recess, and means for transmitting operative movement to said member from said power op erated part.

4. In combination with a sewing machine table and a power operated part beneath said table, and a fabric trimming attachment having a base mounted upon said table and a rotary trimming. operating means for said trimming member; the upper surface of said table beneath the attachment base being recessed, and said operating means including a member mounted to reciprocate in said recess substantially in the l plane of said table, and means directly connecting said member with said power operated part and a power operated part mounted beneath said table, and a fabric trimming attachment having a base mounted upon the table and a rotary trimming member; operating means for said trimming member, said table being provided with a channel in the upper surface thereof and an opening communicating with the bottom of said channel, said operating means including a meniber mounted to reciprocate in said channel, and means extending through said opening and operatively connecting said member with said power operated part.

6. In combination with the table I and feed mechanism of a sewing machine, and a fabric trimming attachment mounted upon said table having a rotary trimming member; operating means for said trimming member, said table being provided with a recess in its upper surface and an opening communicating therewith, said operating means including a member movable in said recess, and means operatively connecting said member through said opening witha movable element of the feed mechanism.

7, In combination with the table-and feed mechanism of a sewing machine, and a fabric trimming attachment having a base mounted upon said table and a rotary trimming member; operating means for said'trimming member including a, member, independent of said attachment, movably supported by the table'beneath said base, and means operatively connecting said member with a movable element of the feed mechanism.

a. In combination with the table and feed mechanism of a sewing machine, and a fabric,

trimming attachment having a base mounted upon said table and a'rotary trimming member; operating means for said member including a member supported independently of the feed mechanism for reciprocatingmovement between the lower surface of the table and the upper surface of the attachment base, and means for transmitting reciprocatory motion to said member from a movable element of the feed mechanism.

9. In combination with the table and feed mechanism. of a sewing machine, and a fabric trimming attachment having a base mounted upon said table and a rotary trimming member; operating means for said trimming member,

said trimming member operable to translate oscillatory motion of said element into intermittent rotary motion of said trimming member,

said operating connections including a recipro-j' catory member directly supported by the table and directly connected with and actuated by said oscillatory element.

' 11. In combination with a sewing machine table and feed mechanism having a vertically disposed oscillatoryelement, and a fabric trimming attachment mounted upon said table having a trimming member rotatable in a substantially horizontal plane; operating connections between said oscillatory element and the trimming" member for. translating oscillating motion of said element into intermittent rotary motion of said trimming member, said operating connections including a reciprocatory member supported by the table and operatively connected at one of its ends with said oscillatory element.

12. In combination -with a sewing machine table and feed mechanism beneath said table I having an oscillatory element, and a. fabric trimming attachment having a base mounted on said table and a trimming member rotatable in a plane substantially parallel with the base; said table having a channel in its upper surface beneath the attachment base, and operating, connections between the oscillatory element and trimming member to translate oscillatory motion of the formerinto intermittent rotary motion of the latter, said connections including a member mounted to reciprocate in said channel and directly connected-with said oscillatory element of the feed mechanism.

. VICTOR J. SIGODA. 

